When we're sitting this bend, called the anorectal angle, is kinked which puts upward pressure on the rectum and keeps the feces inside. This creates the need to STRAIN in order to eliminate. Compare sitting on the toilet to a kinked garden hose, it just doesn't work properly. In a squatting posture the bend straightens out and defecation becomes easier.
Assuming the squat position is the natural way to achieve easier and more complete elimination. Research has shown that in some people, the kink is completely gone while squatting.
2. There are many health benefits to squatting including:• Un-kinking your rectum taking your body from a continent mode to an elimination mode. • Reduced straining and decreased pressure in the anal and rectal veins. • Easier elimination and efficiency – complete emptying of the bowel.
Remember to practice upon this with the intention of practicing upon a Sunnah of the Beloved Prophet [peace be upon him] and not for the benefits, those are just extra accessories.
[Source of the Ahadith: Sunnats, Revised edition, Majlis ul Ulamah, Natal, South Africa]